Light-conductor.



K. RBGKNAGEL.

LIGHT CONDUCTOR.

APPLICATION FILED 131 11.23, 1914.

1 120,744. Patented Dec. 15. 1914.

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I 'HE NORRIS PETERS c0. FHOTO-LITHQ. WASHINGTON. n,

KARL REGKNAGEL, OF BOSTON, MASSACHUSETTS.

LIGHT-CONDUCTOR.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed April 23, 1914. Serial No. 834,006.

To all whom it may concern:

Be it known that I, KARL RECKNAGEL, a citizen of the United States, and resident of Boston, county of Sufiolk, State of Massachusetts, have invented an Improvement in Light-Conductors, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My present invention is an apparatus designed for receiving and conducting rays of light from outside a room or buildlng to an inner portion thereof, together with provision for moving or adjusting the light conductor toward any desired point or object in the room.

My invention is particularly serviceable for use in photographic work for enabhng light to be conducted from the exterior of the building, as from a window, skylight, or other opening, directly on to an object or any part of the object, and furthermore, to secure the desired light and shade effects 1n a most direct and positive manner.

I have discovered that in using my improved light conductor, especially in photographic work, it is usually unnecessary to manipulate and. adjust light curtains, light screens, shades, and the like, to secure proper shadow and light effects, as the same can be obtained and in much more simple, easy and satisfactory manner by a simple adjustment of the light conductor. I may also desire to use a reflector outside the building to assist in throwing the rays of light througlrthe light conductor and can secure marked light and shade effects by adjusting the angle of this reflector as well as the adjustment of the position, length, and size of the light con.- ductor itself.

I prefer to make the light conductor in the form of a telescoping funnel-shaped tube and to provide means to adjust the inner end thereof toward or away from the ob ect as may be desired. My light conductors may be made of paper, paper pulp, very light metal or the like, and may be adjustably supported in any suitable manner, as by ropes and pulleys, stands, or otherwise. I may also make such conductors rectangular in cross section, or of other suitable shape for the particular work in hand, a rectangular conductor being preferable where a light conductor of such dlmenslons 1s desired in certain classes of work, such as in taking full length photographs. In either form, tubular, or rectangular, I prefer to provide a light obstructing flange around the open edge of the exterior of the tube, as I find that this construction produces the best results.

Referring to the drawings, illustrating two forms of my invention, Figure 1 is a perspective view of a telescopic tubular light conductor positioned adjacent a window or opening in the side of a room; Fig. 2 is a view, partly in cross section, of a rectangular conductor, also illustrating the position of a light reflector outside the conductor opening; and Fig. 3 is a view on a reduced scale in cross section of the rectangular light conductor shown in Fig. 2.

The tubular light conductor illustrated in Fig. 1 comprises plurality of telescoping sections 1, 2, 3, 4, 5, and 6, although a larger or less number may be employed if desired. The conductor may be fitted in a window or attached to a swinging shutter 7 in the side wall 8 of a room. Preferably the outer portion 1 of the light conductor herein illustratedis provided with an edge flange 9 shown in dotted lines to cover up any light space in the opening in the swinging shutter 7 through which the portion 1 of the light conductor projects. An adjustable support 10 having a movable forked rest 11 held in any desired position as to height by a set screw 12 may also be provided to support the inner end of the tube. It will be readily appreciated that the telescoping members may serve to shorten the light conductor and the stand 10 moved in desired supporting position to throw the light on the object, and obtain the desired light and shade effects.

In Fig. 2 I have illustrated a rectangular form of light conductor 13, also attached to a swinging shutter 1% arranged on the side of a room, the conductor 13 being supported by ropes 15 and 16 extending over pulleys 17 and 18 respectively, and leading to any desired point where it may be manipulated and secured to a cleat on the side of the wall (not shown) as will be readily understood. The conductor 13 is also provided with a peripheral flange 19 similar to the flange 9 on the tubular conductor illustrated in Fig. 1. The light reflector 20 pivotally hinged to the outside of the building and held at a convenient angle by a cord 21 is shown, a similar reflector being used with the tubular conductor illustrated in Fig. 1, if desired. This reflector 20 is preferably of plain white material, as of cardboard or enameled metal surface, and may be angularly adjusted to give increased or decreased reflection of light through the conductor. The rectangular conductor 13 may also be made of telescoping members if desired.

The twotypes of conductors'herein shown are-for illustrative purposes only, it being obvious to those skilled in the art that a suitable form, type orjlength of conductor may beemployed, and that it maybe adjustably fitted in any manner desired, either to a window, to a special opening, or from a skylight or roof in the building. 'While this type of light conductor is of special value in photographic work, it may also be utilized to transmit light to dark corners or remote portions of a room for building, thus enabling work in such room to be performed by daylight much longer than would otherwise be possible, and thereby saving the expense of artificial illumination. Having described my invention, what I copies of this patent may be obtained for five cents each; addressing the claim as new and desire to secure by Letters Patent is:

1. An apparatus of the kind described, com rising 'a light conducting member extending outside a room, and with its inner end movable to difl'erent positions to difluse light within the room.

2. An apparatus of the kind described, comprising alight conducting member eX- tending outside a room, having an opaque flanged portion around the outer opening, and with its inner end movable to different positions to diffuse light within the room,

3. An apparatus of the kind described, comprising a telescopic light conducting member extending outside a room, with its inner end movable to different positions to difluse light within the room, and means to maintain said conductor in angularly adjustable positions. V V

In testimony whereof, I have signedmy name to this specification, in the presenceof two subscribing witnesses, L A

. I KARL REOKNAGEL. v

-Witnesses: r y

J AMES R. HoDDnR, R. J. HERSEY.

Commissioner of Patents,

Washington, D. 6." 

